Dab tsi yuav tsum yog daim duab plaub?
Dab tsi yuav tsum yog daim duab plaub?

Video: Dab tsi yuav tsum yog daim duab plaub?

Video: Dab tsi yuav tsum yog daim duab plaub?
Video: npau suav lwm tus tuaj yuav koj 7/6/2019 2024, Kaum ib hlis
Anonim

Ib quadrilateral YUAV TSUM yog daim duab sib dhos yog tias nws muaj ob khub ntawm nws ob sab sib luag sib luag (lossis sib npaug hauv kev ntsuas). Ib qho plaub fab Yuav tsum yog parallelogram yog hais tias nws muaj ob khub ntawm nws cov opposite ces kaum congruent (los yog sib npaug ntawm kev ntsuas). Ib quadrilateral Yuav tsum yog parallelogram yog hais tias nws muaj ob lub diagonals bisecting ib leeg.

Raws li qhov xwm txheej ntawm parallelogram yog dab tsi?

Cov sab nraud yog congruent; opposite sab yog parallel; cov kaum sab xis yog congruent; ib lub kaum sab xis yog ntxiv rau ob qho tib si nws cov ces kaum sib law liag; ib khub ntawm ob sab sib xws yog sib xws thiab sib luag; kab pheeb ces kaum sib cais ib leeg.

Ib yam li ntawd, dab tsi tsis yog parallelogram? Kev piav qhia: Ib qho plaub fab xwm fab xwm meem uas tsis muaj ob sab sib npaug yog tsis yog parallelogram . Ib tug kite tsis muaj kab sib luag txhua. Ib qho trapezium thiab thiab isosceles trapezium muaj ib khub ntawm ob sab sib luag. Concave quadrilateral los yog xub taub hau ua tsis yog muaj ob sab sib luag

Yog li ntawd, dab tsi faib cov parallelogram?

A parallelogram yog plaub fab plaub fab uas ob tog ntawm ob tog sib txig sib luag. A parallelogram kuj muaj cov khoom nram qab no: Cov kaum sab xis yog congruent; Cov ces kaum uas nyob ib sab yog ntxiv; Cov diagonals sib sib zog nqus.

Puas parallelograms muaj vaj huam sib luag?

Cov Parallelogram A parallelogram muaj rov qab sab parallel thiab sib npaug nyob rau hauv ntev. Kuj opposite ces kaum sib npaug (cov ces kaum "A" yog tib yam, thiab cov ces kaum "B" yog tib yam). NCO TSEG: Squares, Rectangles thiab Rhombuses yog tag nrho Parallelograms !

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